Optical radar device

a radar device and optical technology, applied in the direction of measurement devices, instruments, telescopes, etc., can solve the problems of large-scale and expensive mechanical systems for scanning targets with laser beams, emitted laser beams of weaker intensity, and distance measurement accuracy degradation, etc., to achieve a wide incidence-angle range
US20200142072A1Active Publication Date: 2020-05-07SHARP KK
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SHARP KK
Publication Date
2020-05-07

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Abstract

[Object] To provide a technology in flash LiDAR applicable to a wide incidence-angle range.[Solution] An optical radar device (100) includes a light emitting unit (110) that diffusively radiates a laser beam, an arrayed light receiving unit (120) that receives the laser beam emitted from the light emitting unit (110) and reflected off an object whose range is to be determined (10), the arrayed light receiving unit (120) including light receiving elements arrayed two-dimensionally, and a telecentric lens (140) disposed between the object whose range is to be determined and the light receiving element.
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Description

TECHNICAL FIELD

[0001] The present invention relates to an optical radar device that acquires information on a distance to an object whose range is to be determined.BACKGROUND ART

[0002] These days, a technology of acquiring information on a distance to a target has been increasingly important as an environment recognition technology for automobiles, robots, and other devices. Particularly, as a method of long-distance information measurement, a method of radiating a laser beam to a target and measuring time-of-flight from when the laser beam is reflected off the target until when the laser beam is returned has been widely spread, and referred to as light detection and ranging or laser imaging detection and ranging (LiDAR).

[0003] Examples of a method of radiating laser beams include scanning LiDAR, for scanning a target with focused (refer to NPL 1) or band-shaped (refer to PTL 1) laser beams using a mirror or another device, and flash LiDAR, for collectively and radiating uniformly and ...

Claims

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